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KR101316446B1 - Cam target wheel for vehicle - Google Patents

Cam target wheel for vehicle Download PDF

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Publication number
KR101316446B1
KR101316446B1 KR1020110099106A KR20110099106A KR101316446B1 KR 101316446 B1 KR101316446 B1 KR 101316446B1 KR 1020110099106 A KR1020110099106 A KR 1020110099106A KR 20110099106 A KR20110099106 A KR 20110099106A KR 101316446 B1 KR101316446 B1 KR 101316446B1
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South Korea
Prior art keywords
degrees
cam
target wheel
camshaft
lobe
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Expired - Fee Related
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KR1020110099106A
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Korean (ko)
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KR20130034931A (en
Inventor
조명래
이홍욱
이상희
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현대자동차주식회사
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Priority to KR1020110099106A priority Critical patent/KR101316446B1/en
Priority to US13/316,383 priority patent/US8505372B2/en
Priority to JP2011285176A priority patent/JP2013076394A/en
Priority to CN201210007529.7A priority patent/CN103032122B/en
Priority to DE102012100328A priority patent/DE102012100328A1/en
Publication of KR20130034931A publication Critical patent/KR20130034931A/en
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Publication of KR101316446B1 publication Critical patent/KR101316446B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/04—Sensors
    • F01L2820/041—Camshafts position or phase sensors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Gears, Cams (AREA)
  • Transmissions By Endless Flexible Members (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Transmission Devices (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

본 발명은 자동차용 캠 타겟 휠에 관한 것으로서, 캠 샤프트와; 캠 샤프트의 외주면에 형성되며, 캠 흔들림 파형의 골과 산을 인식할 수 있는 로브를 포함하는 것을 특징으로 한다.
이에, 로브의 개수를 늘리지 않으므로 제조 원가의 상승을 저지할 수 있을 뿐만 아니라, 캠 흔들림을 인식할 수 있으므로 작동 신뢰도를 향상시킬 수 있다.The present invention relates to a cam target wheel for an automobile, the cam target wheel comprising: a cam shaft; And a lobe which is formed on the outer circumferential surface of the camshaft and is capable of recognizing the crest and the mountain of the cam wobble waveform.
Therefore, since the number of lobes is not increased, not only the increase in the manufacturing cost can be prevented, but also the cam shake can be recognized, so that the operation reliability can be improved.

Description

자동차용 캠 타겟 휠{CAM TARGET WHEEL FOR VEHICLE}[0001] CAM TARGET WHEEL FOR VEHICLE [0002]

본 발명은 자동차용 캠 타겟 휠에 관한 것으로서, 보다 상세하게는, 캠 샤프트의 흔들림을 인식할 수 있어 작동성이 향상될 수 있는 자동차용 캠 타겟 휠에 관한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cam target wheel for an automobile, and more particularly, to a cam target wheel for an automobile which can recognize a shake of the cam shaft and can improve operability.

일반적으로, 연속 가변 밸브 타이밍(CVVT, Continuously Variable Valve Timing)이 적용된 엔진에는 캠의 위상을 인식하기 위한 캠 타겟 휠이 마련된다.Generally, an engine to which a continuously variable valve timing (CVVT) is applied is provided with a cam target wheel for recognizing the phase of the cam.

종래의 자동차용 캠 타겟 휠(101)은, 도 1에 도시된 바와 같이, 캠 샤프트(110)와, 캠 샤프트(110)의 외주면에 소정 각도(θ')로 돌출 형성된 로브(120)로 구성된다. 이 때, 로브(120)의 각도(θ')는 180도로 이루어진다. 1, the conventional automotive cam target wheel 101 comprises a camshaft 110 and a lobe 120 protruding from the outer circumferential surface of the camshaft 110 at a predetermined angle? do. At this time, the angle? 'Of the lobe 120 is 180 degrees.

이러한 반달 모양의 로브(120)를 가지는 종래 캠 타겟 휠(101)은 180도 간격(크랭크 기준 360도)의 사각파 신호로 위상을 계산하게 되는데, 각 기통의 폭발에 의한 토크 변동 및 캠 샤프트(110)의 토크 변동이 매 기통마다 발생하며, 이러한 토크 변동은 캠을 매 기통 단위(180도)로 주기적으로 흔들리게 만든다.The conventional cam target wheel 101 having the half-moon shaped lobe 120 calculates a phase with a rectangular wave signal at intervals of 180 degrees (360 degrees based on the crank). The torque fluctuation caused by the explosion of each cylinder and the camshaft 110) occurs in each cylinder, and this torque fluctuation makes the cam periodically fluctuate every cycle unit (180 degrees).

특히, 유압에 의해 제어되는 CVVT가 적용된 사양에서는, 캠 샤프트(110)의 흔들림이 보통 180도 간격으로 주기적으로 발생하나, 종래 반달 모양의 캠 타겟 휠(101)은 크랭크 기준으로 360도 등간격으로 캠 샤프트(110)의 위상을 인식하기 때문에, 캠 흔들림을 인식할 수 없는 문제점이 있다. Particularly, in the specification to which the CVVT controlled by the hydraulic pressure is applied, the swing of the camshaft 110 periodically occurs at regular intervals of 180 degrees, but the camshaft wheel 101 of the conventional semi- Since the phase of the camshaft 110 is recognized, there is a problem that the cam shake can not be recognized.

즉, 도 2에 도시된 바와 같이, 동일한 운전조건에서 경우 1과 경우 2에서, 이씨유(ECU)에서는 캠 타겟 휠 센서 신호를 기준으로 캠 샤프트(110)가 동일하게 제어되는 것으로 인식하고 있으나, 실제 경우 1 대비 경우 2에서는 캠 흔들림이 과다하게 발생하나 반달 모양의 형상 특성에 의해 이씨유(ECU)에서는 캠 흔들림을 인식하지 못하는 문제가 있다. 특히, 캠이 과다하게 흔들리게 되는 경우, 밸브 개폐 시점이 바뀌게 되므로, 엔진 출력이 저하되는 문제점이 있었다. In other words, as shown in FIG. 2, in case 1 and case 2 under the same operating condition, the ECU recognizes that the camshaft 110 is controlled on the basis of the cam target wheel sensor signal, In actual case 1, the cam shake occurs excessively in Case 2, but the cam shake is not recognized in the ECU due to the shape characteristics of the half-moon shape. Particularly, when the cam is excessively shaken, the valve opening / closing timing is changed, and the engine output is lowered.

이러한 문제점을 해결하기 위해, 캠 샤프트(110)의 외주면에 로브(120)를 북수개 형성하여, 캠 흔들림의 인식 능력을 향상시킬 수도 있겠으나, 이와 같이 로브(120)를 복수개 형성하면 로직 개발 및 공장 라인 변경 등의 대폭적인 변동이 필요하여 제조 원가가 상승하는 문제점이 있었다.
In order to solve such a problem, it is possible to improve the recognition performance of the cam shake by forming a plurality of lobes 120 on the outer circumferential surface of the camshaft 110. However, if a plurality of the lobes 120 are formed, There is a problem that the production cost is increased due to the necessity of a large variation in the factory line change and the like.

따라서, 본 발명의 목적은 로브의 개수를 늘리지 않으므로 제조 원가의 상승을 저지할 수 있을 뿐만 아니라, 캠 흔들림을 인식할 수 있으므로 작동 신뢰도를 향상시킬 수 있는 자동차용 캠 타겟 휠을 제공하는 것이다. Therefore, an object of the present invention is to provide an automotive cam target wheel that can increase the production cost because it does not increase the number of lobes, and can recognize the cam shake, thereby improving operational reliability.

상기 목적은 본 발명의 자동차용 캠 타겟 휠에 따라, 캠 샤프트와; 캠 샤프트의 외주면에 형성되며, 캠 흔들림 파형의 골과 산을 인식할 수 있는 로브에 의해 달성된다. According to an automotive cam target wheel of the present invention, the above object is achieved by a cam follower comprising: a cam shaft; And a lobe that is formed on the outer circumferential surface of the camshaft and is capable of recognizing the crest and the mountain of the cam wobble waveform.

여기서, 상기 로브는 상기 캠 샤프트의 외주면에 연속적으로 돌출 형성되며, 그 각도는 125도(180도-55도) ∼ 145도(180도-35도)로 이루어진 것이 바람직하다.Here, the lobe is continuously protruded from the outer circumferential surface of the camshaft, and the angle is preferably 125 degrees (180 degrees-55 degrees) to 145 degrees (180 degrees-35 degrees).

또는, 상기 로브는 상기 캠 샤프트의 외주면에 연속적으로 돌출 형성되며, 그 각도는 215도(180도+35도) ∼ 235도(180도+55도)로 이루어질 수도 있다. Alternatively, the lobe continuously protrudes from the outer circumferential surface of the camshaft, and the angle may be 215 degrees (180 degrees + 35 degrees) to 235 degrees (180 degrees + 55 degrees).

이상 설명한 바와 같이, 본 발명에 따르면, 로브의 개수를 늘리지 않으므로 제조 원가의 상승을 저지할 수 있을 뿐만 아니라, 캠 흔들림을 인식할 수 있으므로 작동 신뢰도를 향상시킬 수 있는 자동차용 캠 타겟 휠이 제공된다.
INDUSTRIAL APPLICABILITY As described above, according to the present invention, there is provided an automotive cam target wheel capable of preventing an increase in manufacturing cost from increasing the number of lobes and recognizing cam shake, thereby improving operational reliability .

도 1은 종래 자동차용 캠 타겟 휠의 단면도.
도 2는 종래 자동차용 캠 타겟 휠의 문제점을 설명하기 위한 그래프.
도 3은 본 발명에 따른 자동차용 캠 타겟 휠의 단면도.
도 4는 본 발명에 따른 자동차용 캠 타겟 휠에 의한 출력 상태를 도시한 그래프.1 is a sectional view of a conventional cam target wheel;
2 is a graph for explaining a problem of a conventional cam target wheel.
3 is a sectional view of a cam target wheel for a vehicle according to the present invention.
4 is a graph showing an output state of the cam target wheel for an automobile according to the present invention.

이하에서는 첨부도면을 참조하여 본 발명에 대해 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 자동차용 캠 타겟 휠의 단면도이고, 도 4는 본 발명에 따른 자동차용 캠 타겟 휠에 의한 출력 상태를 도시한 그래프이다. FIG. 3 is a cross-sectional view of an automotive cam target wheel according to the present invention, and FIG. 4 is a graph illustrating an output state of the automotive cam target wheel according to the present invention.

본 발명에 따른 자동차용 캠 타겟 휠(1)은, 도 3 및 도 4에 도시된 바와 같이, 캠 샤프트(10)와, 캠 샤프트(10)의 외주면에 형성되며 캠 흔들림 파형의 골과 산을 인식할 수 있는 로브(20)로 구성된다. 3 and 4, the automotive cam target wheel 1 according to the present invention includes a camshaft 10, a camshaft 10 formed on the outer circumferential surface of the camshaft 10, And a lobe 20 which can be recognized.

이 때, 로브(20)는 캠 샤프트(10)의 외주면에 연속적으로 돌출 형성되며, 그 각도(θ)는 125도(180도-55도) ∼ 145도(180도-35도)로 이루어진 것이 좋다. 특히, 본 실시예에서는 로브(20)의 각도(θ)를 135도(180도-45도)로 하였고, 이러한 캠 타겟 휠(1)을 적용하여 캠 흔들림을 시험한 결과, 도 4와 같이 캠 흔들림 파형의 산과 골이 정확하게 인식할 수 있어 캠 흔들림이 출력 정상일 때와 동일 수준으로 제어되므로, 작동 신뢰도가 향상될 수 있는 이점이 있다. At this time, the lobe 20 is continuously protruded from the outer circumferential surface of the camshaft 10 and has an angle? Of 125 degrees (180 degrees-55 degrees) to 145 degrees (180 degrees-35 degrees) good. Particularly, in this embodiment, the angle? Of the lobe 20 is set to 135 degrees (180 degrees to 45 degrees). As a result of testing the cam shake by applying the cam target wheel 1, The mountain and the crest of the shaking waveform can be correctly recognized, and the cam shaking is controlled to be the same level as when the output is steady, so that there is an advantage that the operation reliability can be improved.

또한, 본 발명의 캠 타겟 휠(1)의 경우에는 캠 흔들림을 인식하기 위해 로브(20)를 복수개로 구성하지 않고 단일개로 구성하고 있기 때문에, 로직을 변경하거나 공장 설비를 변경할 필요가 없으므로, 제조 원가가 상승되는 것을 저지할 수 있는 이점이 있다.
Further, in the case of the cam target wheel 1 of the present invention, since the lobs 20 are not constituted by a plurality of lobes in order to recognize the cam shake, There is an advantage that the cost can be prevented from rising.

전술한 실시예에서의 캠 타겟 휠에서는, 로브의 각도를 125도(180도-55도) ∼ 145도(180도-35도)로 구성하였으나, 215도(180도+35도) ∼ 235도(180도+55도)로 구성할 수도 있음은 물론이다.
In the cam target wheel in the above-described embodiment, the angle of the lobe was set at 125 degrees (180 degrees-55 degrees) to 145 degrees (180 degrees-35 degrees) (180 degrees + 55 degrees).

1 : 캠 타겟 휠 10 : 캠 샤프트
20 : 로브1: Cam target wheel 10: Cam shaft
20: Robe

Claims (3)

삭제delete 캠 샤프트와;
캠 샤프트의 외주면에 형성되며, 캠 흔들림 파형의 골과 산을 인식할 수 있는 로브를 포함하며,
상기 로브는 상기 캠 샤프트의 외주면에 연속적으로 돌출 형성되며, 상기 로브의 각도는 125도(180도-55도) ∼ 145도(180도-35도)로 이루어진 것을 특징으로 하는 자동차용 캠 타겟 휠.A camshaft;
And a lobe formed on an outer circumferential surface of the camshaft and capable of recognizing a crest and a mountain of a cam wobble waveform,
Wherein the lobe is continuously protruded from the outer circumferential surface of the camshaft and the angle of the lobe is 125 degrees (180 degrees-55 degrees) to 145 degrees (180 degrees-35 degrees). . 캠 샤프트와;
캠 샤프트의 외주면에 형성되며, 캠 흔들림 파형의 골과 산을 인식할 수 있는 로브를 포함하며,
상기 로브는 상기 캠 샤프트의 외주면에 연속적으로 돌출 형성되며, 상기 로브의 각도는 215도(180도+35도) ∼ 235도(180도+55도)로 이루어진 것을 특징으로 하는 자동차용 캠 타겟 휠.A camshaft;
And a lobe formed on an outer circumferential surface of the camshaft and capable of recognizing a crest and a mountain of a cam wobble waveform,
Wherein the lobe is continuously formed on an outer circumferential surface of the camshaft and the angle of the lobe is 215 degrees (180 degrees + 35 degrees) to 235 degrees (180 degrees + 55 degrees) .
KR1020110099106A 2011-09-29 2011-09-29 Cam target wheel for vehicle Expired - Fee Related KR101316446B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020110099106A KR101316446B1 (en) 2011-09-29 2011-09-29 Cam target wheel for vehicle
US13/316,383 US8505372B2 (en) 2011-09-29 2011-12-09 Cam target wheel for vehicle
JP2011285176A JP2013076394A (en) 2011-09-29 2011-12-27 Cam target wheel for automobile
CN201210007529.7A CN103032122B (en) 2011-09-29 2012-01-11 Cam target wheel for vehicle
DE102012100328A DE102012100328A1 (en) 2011-09-29 2012-01-16 Cam disk wheel of a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110099106A KR101316446B1 (en) 2011-09-29 2011-09-29 Cam target wheel for vehicle

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KR20130034931A KR20130034931A (en) 2013-04-08
KR101316446B1 true KR101316446B1 (en) 2013-10-08

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US (1) US8505372B2 (en)
JP (1) JP2013076394A (en)
KR (1) KR101316446B1 (en)
CN (1) CN103032122B (en)
DE (1) DE102012100328A1 (en)

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